Journal of Integrative Agriculture ›› 2014, Vol. 13 ›› Issue (1): 177-186.DOI: 10.1016/S2095-3119(13)60594-8

• 论文 • 上一篇    下一篇

Soil Quality Assessment of Acid Sulfate Paddy Soils with Different Productivities in Guangdong Province, China

 LIU Zhan-jun, ZHOU Wei, SHEN Jian-bo, LI Shu-tian, LIANG Guo-qing, WANG Xiu-bin, SUN Jing-wen , AI Chao   

  1. 1.Key Laboratory of Plant Nutrition and Fertilization, Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China
    2.College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, P.R.China
  • 收稿日期:2012-12-12 出版日期:2014-01-01 发布日期:2014-01-04
  • 通讯作者: ZHOU Wei, Tel: +86-10-82108671, E-mail: wzhou@caas.ac.cn
  • 作者简介:LIU Zhan-jun, E-mail: liuzhanjun07@126.com
  • 基金资助:

    This research was supported by the Special Fund for Agro- scientific Research in the Public Interest, China (201003016), the earmarked fund for China Agriculture Research System (CARS-01-31), and the National Basic Research Program of China (2013CB127405).

Soil Quality Assessment of Acid Sulfate Paddy Soils with Different Productivities in Guangdong Province, China

 LIU Zhan-jun, ZHOU Wei, SHEN Jian-bo, LI Shu-tian, LIANG Guo-qing, WANG Xiu-bin, SUN Jing-wen , AI Chao   

  1. 1.Key Laboratory of Plant Nutrition and Fertilization, Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China
    2.College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, P.R.China
  • Received:2012-12-12 Online:2014-01-01 Published:2014-01-04
  • Contact: ZHOU Wei, Tel: +86-10-82108671, E-mail: wzhou@caas.ac.cn
  • About author:LIU Zhan-jun, E-mail: liuzhanjun07@126.com
  • Supported by:

    This research was supported by the Special Fund for Agro- scientific Research in the Public Interest, China (201003016), the earmarked fund for China Agriculture Research System (CARS-01-31), and the National Basic Research Program of China (2013CB127405).

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摘要： Land conversion is considered an effective measure to ensure national food security in China, but little information is available on the quality of low productivity soils, in particular those in acid sulfate soil regions. In our study, acid sulfate paddy soils were divided into soils with high, medium and low levels based on local rice productivity, and 60 soil samples were collected for analysis. Twenty soil variables including physical, chemical and biochemical properties were determined. Those variables that were significantly different between the high, medium and low productivity soils were selected for principal component analysis, and microbial biomass carbon (MBC), total nitrogen (TN), available silicon (ASi), pH and available zinc (AZn) were retained in the minimum data set (MDS). After scoring the MDS variables, they were integrated to calculate a soil quality index (SQI), and the high, medium and low productivity paddy soils received mean SQI scores of 0.95, 0.83 and 0.60, respectively. Low productivity paddy soils showed worse soil quality, and a large discrepancy was observed between the low and high productivity paddy soils. Lower MBC, TN, ASi, pH and available K (AK) were considered as the primary limiting factors. Additionally, all the soil samples collected were rich in available P and AZn, but deficient in AK and ASi. The results suggest that soil AK and ASi deficiencies were the main limiting factors for all the studied acid sulfate paddy soil regions. The application of K and Si on a national basis and other sustainable management approaches are suggested to improve rice productivity, especially for low productivity paddy soils. Our results indicated that there is a large potential for increasing productivity and producing more cereals in acid sulfate paddy soil regions.

关键词: soil quality assessment , acid sulfate paddy soil , soil quality index , different productivity

Abstract: Land conversion is considered an effective measure to ensure national food security in China, but little information is available on the quality of low productivity soils, in particular those in acid sulfate soil regions. In our study, acid sulfate paddy soils were divided into soils with high, medium and low levels based on local rice productivity, and 60 soil samples were collected for analysis. Twenty soil variables including physical, chemical and biochemical properties were determined. Those variables that were significantly different between the high, medium and low productivity soils were selected for principal component analysis, and microbial biomass carbon (MBC), total nitrogen (TN), available silicon (ASi), pH and available zinc (AZn) were retained in the minimum data set (MDS). After scoring the MDS variables, they were integrated to calculate a soil quality index (SQI), and the high, medium and low productivity paddy soils received mean SQI scores of 0.95, 0.83 and 0.60, respectively. Low productivity paddy soils showed worse soil quality, and a large discrepancy was observed between the low and high productivity paddy soils. Lower MBC, TN, ASi, pH and available K (AK) were considered as the primary limiting factors. Additionally, all the soil samples collected were rich in available P and AZn, but deficient in AK and ASi. The results suggest that soil AK and ASi deficiencies were the main limiting factors for all the studied acid sulfate paddy soil regions. The application of K and Si on a national basis and other sustainable management approaches are suggested to improve rice productivity, especially for low productivity paddy soils. Our results indicated that there is a large potential for increasing productivity and producing more cereals in acid sulfate paddy soil regions.

Key words: soil quality assessment , acid sulfate paddy soil , soil quality index , different productivity